Atomic arrangements of quasicrystal bilayer graphene: Interlayer distance expansion

Yuki Fukaya, Yuhao Zhao, Hyun Woo Kim, Joung Real Ahn, Hirokazu Fukidome, Iwao Matsuda

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Bilayer graphene exhibits outstanding characteristics that can be modified by adjusting the twist angle between two layers. An exact 30°-twisted bilayer graphene forms a material comprising two-dimensional quasicrystals accompanied by a relativistic Dirac fermion. In this study, the atomic arrangements of quasicrystal bilayer graphene on a SiC(0001) substrate are identified using positron diffraction. The interlayer distance in quasicrystal bilayer graphene is determined to be 3.46 Å, revealing an expansion of 0.17 Å as compared with that of Bernal-stacked bilayer graphene. This result provides important insights for elucidating the origin of the magnitude of coupling between graphene layers.

本文言語English
論文番号L180202
ジャーナルPhysical Review B
104
18
DOI
出版ステータスPublished - 2021 11月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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